Walter marsh jackson



w. M, JACKSON METHOD OF FORMING GAS OUTLETS.

(No Model.)

Patentgd Apr. 2,1889.

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8 UNIT STATES PATENT OFFICE.

WALTER MARSH-JACKSON, on NEW YORK, N. Y.

METHOD OF FORMING GAS-OUTLETS.

SPECIFICATION forming part of Letters Patent No. 400,683, dated April 2,1889.

Application filed November 6, 1888. Serial No. 290,103. (No model.)

To all whom it may concern:

Be it known that I, WALTER MARsH JACK- SON, of New York, in the countyof New York.

and State of New York, have invented certain new and useful Improvementsin the Method of Forming Gas-Outlets; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to an improvement in the method of forminggas-outlets.

In Patent No. 381,380, granted-to me April 17, 1888, I claim a processconsisting in first forming a series of openings through the fiat orexternally-convex surface of the top of a closed. pillar or tip andsubsequently changin g the directions or axis of said openingsbydepressing or countersinking the top. By such process, in order togive a material change to the axis of the openings, the top of thepillar must be quite thick and of a single piece of metal, or thecountersink quite deep. In the present process the top can be thickenedby separate blocks, and the depth of the cavity in the top isimmaterial, as the holes are formed after the end of the tip has beenshaped.

In the accompanying drawings, Figure 1 is a vertical section through atip having the separate conical disk. Fig. 2 shows plan views of thesame with two, three, and four perforations. Fig. 3 is a verticalsection of a second form. Fig. 4 shows plan views of the same.

Figs. 5 and 6 show vertical section and plan views of a third form.Figs. 7 and 8 show similar views of a fourth form. Figs. 9 and 10 aresimilar views of a fifth approved form'; and Figs. 11, 12, 13, 14, andshow the heads applied to gas-pillars.

A very large class of gas-consumers prefer to use what is known as theScotch tip or jetoutlet, which consists, broadly, of two convergingperforations meeting in the top of a tip or pillar. It is thereforedesirable that such outlets should be made properly to insure thegreatest amount of light with the least consumption of gas and withfreedom from smoke when passing gases of high candle-powder. In order toobtain such results, it is necessary to so construct the apertures orgas-outlets that the gas cannot rise through them in a vertical line,but so that instead it shall take the direction of the apertures, andthus be directed into each others current or discharge at the extremeapex of the apertures. Now a tiphead or a gas-burner pillar-head isnecessarily too thin when formed from sheet metal by drawing or othermeans to afford stock enough to obtain the kind of perforation oraperture desired. It therefore becomes necessary to change the form ofthe inner surface of the head of the tip or pillar to secure the desiredresult. This change may be made in two ways, both of which accomplishthe same result-one by inserting a separate piece of stock or a disk inthe tip or pillar and driving the same snugly into position against theunder surface of the head, and the other by forcing the metal, afterdrawing or at the time of drawing, into a head the inner surface ofwhich is convex, accomplished by forcing the metal by dies or othersuitable means and then drilling the holes or apertures. In other words,in one case the result is accomplished by the use of two distinctpieces-the head and the disk-and in the other by a single integral pieceproperly shaped. The former construction is illustrated in Figs. 1 and11. In these the head A is flat, and being drawn from sheetmetal is toothin to accomplish the result sought, and so a disk, B, preferablypointed, is inserted in the tip or pillar and driven snugly against theunder surface of the head. In the case of tips the shank may be shrunkin after the disk is inserted, and thus the desired taper may be givento the shank to fit a pillar when screw-threads are not used. Now theperforations a, two, three, or four, whatever the number may be, areoblique, converging at the apex or the head into a single aperture. Inall the other constructions the tip or pillar is made in one integralpiece.

In Figs. 3 and 12 the inner surface is made convex by forcing by meansof dies or similar instruments. The perforations are then drilled in, asbefore. The head shown in Figs. 5 and 13 is also formed by forcing. InFigs. 7 and 14 a circular countersink, b, is made in the center of thehead and provided with two or more perforations, a, while in Figs. 9 and15 this countersink is preferably oval or elliptical, with two holes a,therein. By forming the heads with several perforations a duplex,triplex, or other form of flame results, according to the number of theperforations. The general form of the tips and pillars is the same asthose in ordinary use, With the exception of the form of the head, andthis constitutes the feature of improvement.

Having fully described my invention, What I claim as new, and desire tosecure by Letters Patent, is

' 1. The herein-described method of forming gas-outlets, consisting inforcing the head of a closed sheet-metal pillar or tip into shape and atthe same time or subsequently giving the under or inner surface of thehead a convex shape, and then making apertures through the latter insuch directions that none of the escaping gas shall pass verticallyWhile in the apertures, substantially as set forth.

specification in the presence of two subscribo ing Witnesses.

ALTER MARSH JACKSON.

\Vitnesses:

GEORGE T. GADEN, GEORGE M. WARD.

